The BOCCE project is aimed at obtaining in the most homogeneous way the properties (age, distance, reddening, metallicity and detailed elemental abundances) of a sample of (mostly old) Galactic Open Clusters. A detailed description of our program and the results of the first part of the photometric survey can be found in Bragaglia & Tosi (2006).
The clusters observations can be divided in three parts:
(1) PHOTOMETRY : multiband optical CCD photometry (usually BVI)
(2) LOW-RED SPECTROSCOPY: multi object spectra to derive radial velocity and membership
(3) HIGH-RES SPECTROSCOPY: to measure metallicity and detailed chemical composition
Age,
distance, reddening and a first indication of metallicity are obtained
using the synthetic colour-magnitude diagram technique (as developed in
Tosi et al. 1991).
Results of the first 20 OCs can be found in Table 1
The CMDs for the first 20 OCs can be seen here
High-res spectra (FEROS@1.5m ESO, UVES@VLT, SARG@TNG, with R=30000-48000) have been obtained for 3-6 red clump stars per cluster. [Fe/H] and detailed metallcities for several clusters have been determined. See Table 2 for a list of the clusters already analyzed.
MOS with LRS@TNG has been used to derve RVs of stars in key evolutionary phases (Be 29, Be 32, Be 17 done up to now)
A more complete list of the OCs in our sample can be found in Table 3